Originally Posted by
Quonset Hut
Yes, it is too much too soon. You didn't say how old you are, but starting like that is a recipe for injury. Take the next day off. Take every other day off at least for the next two weeks. Don't kill yourself riding their pace if it is too fast. Maybe you can ride together as you warm up and then for a few miles, then let them go and have them pick you up on the way back. Frankly, you are lucky to not be injured now.
Please explain how someone riding ten miles a day on a trail six days a week is following "a recipe for injury." And just what "injury" is the OP cooking up?
The OP may be courting trouble if he has problems with bike fit or health issues, but his post doesn't mention any aside from being out of breath. That's a sign of something, but it needn't be a sign of "injury."